imapfilter/imapfilter/file.c

#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <regex.h>
#include <string.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>

#include "config.h"
#include "imapfilter.h"
#include "data.h"


extern char logfile[PATH_MAX];
extern unsigned int options;
extern unsigned int flags;
extern unsigned int interval;
extern long timeout;
extern char *home;

#ifdef ENCRYPTED_PASSWORDS
char *passphr;                  /* Master password to access the
                                   passwords file. */
#endif


/*
 * Find the path to configuration file, open it and call parse_config().
 */
int read_config(char *cfg)
{
    int r;
    FILE *fd;
    char *c = NULL;

    if (!cfg) {
        cfg = c = (char *) xmalloc(PATH_MAX * sizeof(char));

        snprintf(cfg, PATH_MAX, "%s/%s", home, ".imapfilterrc");
    }
#ifdef DEBUG
    printf("debug: configuration file: '%s'\n", cfg);
#endif
#ifdef CHECK_PERMISSIONS
    check_file_perms(cfg, S_IRUSR | S_IWUSR);
#endif
    fd = fopen(cfg, "r");

    if (!fd)
        fatal(ERROR_FILE_OPEN, "imapfilter: opening config file %s; %s\n",
              cfg, strerror(errno));

    if (c)
        xfree(c);

    if ((r = parse_config(fd)))
        fatal(ERROR_CONFIG_PARSE,
              "imapfilter: parse error in config file at row %d\n", r);

    fclose(fd);

#ifdef DEBUG
    printf("debug: options: %0#10x\n", options);
#endif

    return 0;
}


/*
 * Parse configuration file.
 */
int parse_config(FILE * fd)
{
    int i, r = 0;
    unsigned int row = 0;
    char line[LINE_MAX];
    regex_t creg[13];
    regmatch_t match[8];
    const char *reg[13] = {
        "^([[:blank:]]*\n|#.*\n)$",
        "^[[:blank:]]*ACCOUNT[[:blank:]]+(([[:graph:]]+):([[:graph:]]*)|([[:graph:]]+))@([[:alnum:].-]+)(:[[:digit:]]+)?[[:blank:]]*([[:blank:]]SSL|[[:blank:]]SSL2|[[:blank:]]SSL3|[[:blank:]]TLS1)?[[:blank:]]*\n$",
        "^[[:blank:]]*FOLDER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+([[:print:]]+)[[:blank:]]*\n$",
        "^[[:blank:]]*FILTER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]*([[:blank:]]OR|[[:blank:]]AND)?[[:blank:]]*\n$",
        "^[[:blank:]]*ACTION[[:blank:]]+(DELETE|COPY[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)|MOVE[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)|LIST)[[:blank:]]*([[:graph:]]*)[[:blank:]]*\n$",
        "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(ANSWERED|DELETED|DRAFT|FLAGGED|NEW|OLD|RECENT|SEEN|UNANSWERED|UNDELETED|UNDRAFT|UNFLAGGED|UNSEEN)[[:blank:]]*\n$",
        "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(BCC|BODY|CC|FROM|SUBJECT|TEXT|TO)[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]*\n$",
        "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(HEADER)[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]*\n$",
        "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(LARGER|SMALLER|OLDER|NEWER)[[:blank:]]+([[:digit:]]+)[[:blank:]]*\n$",
        "^[[:blank:]]*JOB[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]*\n$",
        "^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(LOGFILE)[[:blank:]]*=[[:blank:]]*([[:print:]]+)\n$",
        "^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(HEADERS|NAMESPACE)[[:blank:]]*=[[:blank:]]*(YES|NO)[[:blank:]]*\n$",
        "^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(DAEMON|TIMEOUT)[[:blank:]]*=[[:blank:]]*([[:digit:]]+)\n$"
    };

    for (i = 0; i < 13; i++)
        regcomp(&creg[i], reg[i], REG_EXTENDED | REG_ICASE);

    while (fgets(line, LINE_MAX - 1, fd)) {
        row++;
        if (!regexec(&creg[0], line, 0, match, 0))
            continue;
        else if (!regexec(&creg[1], line, 8, match, 0))
            set_account(line, match);
        else if (!regexec(&creg[2], line, 3, match, 0))
            r = set_mboxgrp(line, match);
        else if (!regexec(&creg[3], line, 3, match, 0))
            r = set_filter(line, match);
        else if (!regexec(&creg[4], line, 5, match, 0))
            r = set_action(line, match);
        else if (!regexec(&creg[5], line, 7, match, 0) ||
                 !regexec(&creg[6], line, 7, match, 0) ||
                 !regexec(&creg[7], line, 7, match, 0) ||
                 !regexec(&creg[8], line, 7, match, 0))
            r = set_mask(line, match);
        else if (!regexec(&creg[9], line, 3, match, 0))
            r = set_job(line, match);
        else if (!regexec(&creg[10], line, 4, match, 0) ||
                 !regexec(&creg[11], line, 4, match, 0) ||
                 !regexec(&creg[12], line, 4, match, 0))
            set_options(line, match);
        else
            return row;

        if (r == ERROR_CONFIG_PARSE)
            return row;
    }

    for (i = 0; i < 13; i++)
        regfree(&creg[i]);

    destroy_data();

    return 0;
}


/*
 * Set other options found in config file.
 */
void set_options(char *line, regmatch_t * match)
{
    if (!strncasecmp(line + match[2].rm_so, "logfile", 7)) {
        if (!*logfile)
            strncat(logfile, line + match[3].rm_so,
                    min((match[3].rm_eo - match[3].rm_so), PATH_MAX - 1));
    } else if (!strncasecmp(line + match[2].rm_so, "header", 6)) {
        if (!strncasecmp(line + match[3].rm_so, "yes", 3))
            options |= OPTION_HEADERS;
        else
            options &= ~(OPTION_HEADERS);
    } else if (!strncasecmp(line + match[2].rm_so, "namespace", 9)) {
        if (!strncasecmp(line + match[3].rm_so, "yes", 3))
            options |= OPTION_NAMESPACE;
        else
            options &= ~(OPTION_NAMESPACE);
    } else if (!strncasecmp(line + match[2].rm_so, "timeout", 7)) {
        errno = 0;
        timeout = strtol(line + match[3].rm_so, NULL, 10);
        if (errno)
            timeout = 0;
    } else if (!strncasecmp(line + match[2].rm_so, "daemon", 6) && 
               !(options & OPTION_DAEMON_MODE)) {
        options |= OPTION_DAEMON_MODE;
        errno = 0;
        interval = strtoul(line + match[3].rm_so, NULL, 10);
        if (errno)
            interval = 0;
    }
}


#ifdef ENCRYPTED_PASSWORDS
/*
 * Open password file and call parse_passwords().
 */
int read_passwords(void)
{
    FILE *fd;
    char pwfile[PATH_MAX];
    
    if (!(flags & FLAG_BLANK_PASSWORD))
        return 1;
    
    passphr = (char *) smalloc(PASSPHRASE_LEN);

    snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords");
#ifdef DEBUG
    printf("debug: passwords file: '%s'\n", pwfile);
#endif
    
    if (!exists_file(pwfile))
        return 1;
    
#ifdef CHECK_PERMISSIONS
    check_file_perms(pwfile, S_IRUSR | S_IWUSR);
#endif

    fd = fopen(pwfile, "r");

    if (!fd)
        fatal(ERROR_FILE_OPEN, "imapfilter: opening passwords file %s; %s\n",
              pwfile, strerror(errno));

    parse_passwords(fd);

    fclose(fd);

    return 0;
}


/*
 *  Parse unencrypted password file.
 */
int parse_passwords(FILE * fd)
{
    int t = 3;
    char *pe = NULL;
    char user[USERNAME_LEN], serv[SERVER_LEN];
    unsigned char *buf;
    char *c, *cp, *line;
    regex_t creg;
    regmatch_t match[4];
    const char *reg = "([[:alnum:].-]+) ([[:graph:]]+) ([[:graph:]]+)";

    do {
        printf("Enter master passphrase: ");
        get_password(passphr, PASSPHRASE_LEN);
    } while (decrypt_passwords(&buf, fd) && --t);
    
    if (!t)
        return ERROR_PASSPHRASE;

    c = cp = sstrdup(buf);
    
    regcomp(&creg, reg, REG_EXTENDED | REG_ICASE);

    while ((line = strsep(&c, "\n")) &&
           !regexec(&creg, line, 4, match, 0)) {
        user[0] = serv[0] = 0;
        
        strncat(serv, line + match[1].rm_so,
                min(match[1].rm_eo - match[1].rm_so, SERVER_LEN - 1));
        strncat(user, line + match[2].rm_so,
                min(match[2].rm_eo - match[2].rm_so, USERNAME_LEN - 1));
        
        if ((pe = (char *) find_password(user, serv)))
            strncat(pe, line + match[3].rm_so,
                    min(match[3].rm_eo - match[3].rm_so, PASSWORD_LEN - 1));
    }
    
    regfree(&creg);
    sfree(cp);   
    sfree(buf);

    return 0;
}


/*
 * Store encrypted passwords to file.
 */
int store_passwords(account_t * accts[])
{
    char pwfile[PATH_MAX];
    FILE *fd;

    snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords");
    
    create_file(pwfile, S_IRUSR | S_IWUSR);

    fd = fopen(pwfile, "w");

    if (!fd)
        fatal(ERROR_FILE_OPEN, "imapfilter: opening passwords file %s; %s\n",
              pwfile, strerror(errno));
    
    encrypt_passwords(fd, accts);
    
    fclose(fd);

    return 0;
}
#endif


/*
 * Create $HOME/.imapfilter directory.
 */
int create_homedir(void)
{
    char *hdn = ".imapfilter";
    
    if (home)
        if (chdir(home))
            error("imapfilter: could not change directory; %s\n",
                  strerror(errno));

    create_dir(hdn, S_IRUSR | S_IWUSR | S_IXUSR);
    
    return 0;
}


/*
 * Check if a file exists.
 */
int exists_file(char *fname)
{
    struct stat fs;
    
    if (access(fname, F_OK))
        return 0;
    
    stat(fname, &fs);
    if (!S_ISREG(fs.st_mode)) {
        error("imapfilter: file %s not a regular file\n", fname);
        return ERROR_FILE_OPEN;
    }
    
    return 1;
}


/* 
 * Check if a directory exists.
 */
int exists_dir(char *dname)
{
    struct stat ds;
    
    if (access(dname, F_OK))
        return 0;
    
    stat(dname, &ds);
    if (!S_ISDIR(ds.st_mode)) {
        error("imapfilter: file %s not a directory\n", dname);
        return ERROR_FILE_OPEN;
    }
    
    return 1;
}


/*
 * Create a file.
 */
int create_file(char *fname, mode_t mode)
{
    int fd = 0;
    
    if (!exists_file(fname)) {
        fd = open(fname, O_CREAT | O_WRONLY | O_TRUNC, mode);
        if (fd == -1) {
            error("imapfilter: could not create file %s; %s\n", fname,
                  strerror(errno));
            return ERROR_FILE_OPEN;
        }
        close(fd);
    }

    return 0;
}


/*
 * Create a directory.
 */
int create_dir(char *dname, mode_t mode)
{
    if (!exists_dir(dname))
        if (mkdir(dname, mode))
            error("imapfilter: could not create directory %s; %s\n", dname,
                  strerror(errno));

    return 0;
}


#ifdef CHECK_PERMISSIONS
/*
 * Check the permissions of a file.
 */
int check_file_perms(char *fname, mode_t mode)
{
    struct stat fs;

    if (stat(fname, &fs)) {
        error("imapfilter: getting file %s status; %s\n", fname,
              strerror(errno));
        return ERROR_TRIVIAL;
    }
    if (!S_ISREG(fs.st_mode)) {
        error("imapfilter: file %s not a regular file\n", fname);
        return ERROR_TRIVIAL;
    }
    if ((fs.st_mode & 00777) != mode) {
        error("imapfilter: warning: improper file %s permissions\n"
              "imapfilter: warning: file's mode should be %o not %o\n",
              fname, mode, fs.st_mode & 00777);
        return ERROR_TRIVIAL;
    }
    return 0;
}


/*
 * Check the permissions of a directory.
 */
int check_dir_perms(char *dname, mode_t mode)
{
    struct stat ds;

    if (stat(dname, &ds)) {
        error("imapfilter: getting file %s status; %s\n", dname,
              strerror(errno));
        return ERROR_TRIVIAL;
    }
    if (!S_ISDIR(ds.st_mode)) {
        error("imapfilter: file %s not a directory\n", dname);
        return ERROR_TRIVIAL;
    }
    if ((ds.st_mode & 00777) != mode) {
        error("imapfilter: warning: improper dir %s permissions\n"
              "imapfilter: warning: file's mode should be %o not %o\n",
              dname, mode, ds.st_mode & 00777);
        return ERROR_TRIVIAL;
    }
    return 0;
}
#endif


1	lefcha	1.1	#include <stdio.h>
2	lefcha	1.28	#include <unistd.h>
3	lefcha	1.1	#include <errno.h>
4	lefcha	1.5	#include <sys/types.h>
5	lefcha	1.1	#include <regex.h>
6			#include <string.h>
7			#include <stdlib.h>
8			#include <limits.h>
9	lefcha	1.10	#include <sys/stat.h>
10	lefcha	1.28	#include <fcntl.h>
11	lefcha	1.29	#include <time.h>
12	lefcha	1.1
13			#include "config.h"
14			#include "imapfilter.h"
15	lefcha	1.13	#include "data.h"
16	lefcha	1.1
17
18	lefcha	1.6	extern char logfile[PATH_MAX];
19	lefcha	1.11	extern unsigned int options;
20	lefcha	1.34	extern unsigned int flags;
21			extern unsigned int interval;
22	lefcha	1.28	extern long timeout;
23	lefcha	1.29	extern char *home;
24
25			#ifdef ENCRYPTED_PASSWORDS
26	lefcha	1.31	char passphr; / Master password to access the
27			passwords file. */
28	lefcha	1.28	#endif
29	lefcha	1.27
30	lefcha	1.1
31			/*
32	lefcha	1.13	* Find the path to configuration file, open it and call parse_config().
33	lefcha	1.1	*/
34			int read_config(char *cfg)
35			{
36			int r;
37	lefcha	1.29	FILE *fd;
38	lefcha	1.23	char *c = NULL;
39	lefcha	1.24
40	lefcha	1.1	if (!cfg) {
41	lefcha	1.23	cfg = c = (char ) xmalloc(PATH_MAX sizeof(char));
42	lefcha	1.8
43	lefcha	1.1	snprintf(cfg, PATH_MAX, "%s/%s", home, ".imapfilterrc");
44			}
45			#ifdef DEBUG
46	lefcha	1.11	printf("debug: configuration file: '%s'\n", cfg);
47	lefcha	1.1	#endif
48	lefcha	1.13	#ifdef CHECK_PERMISSIONS
49	lefcha	1.28	check_file_perms(cfg, S_IRUSR \| S_IWUSR);
50	lefcha	1.12	#endif
51	lefcha	1.29	fd = fopen(cfg, "r");
52	lefcha	1.1
53	lefcha	1.29	if (!fd)
54	lefcha	1.17	fatal(ERROR_FILE_OPEN, "imapfilter: opening config file %s; %s\n",
55	lefcha	1.11	cfg, strerror(errno));
56	lefcha	1.1
57	lefcha	1.23	if (c)
58	lefcha	1.29	xfree(c);
59	lefcha	1.23
60	lefcha	1.29	if ((r = parse_config(fd)))
61	lefcha	1.17	fatal(ERROR_CONFIG_PARSE,
62			"imapfilter: parse error in config file at row %d\n", r);
63	lefcha	1.1
64	lefcha	1.29	fclose(fd);
65	lefcha	1.1
66	lefcha	1.11	#ifdef DEBUG
67			printf("debug: options: %0#10x\n", options);
68			#endif
69
70	lefcha	1.17	return 0;
71	lefcha	1.1	}
72
73	lefcha	1.6
74	lefcha	1.10	/*
75	lefcha	1.13	* Parse configuration file.
76	lefcha	1.1	*/
77	lefcha	1.29	int parse_config(FILE * fd)
78	lefcha	1.1	{
79	lefcha	1.17	int i, r = 0;
80	lefcha	1.1	unsigned int row = 0;
81			char line[LINE_MAX];
82	lefcha	1.27	regex_t creg[13];
83	lefcha	1.28	regmatch_t match[8];
84	lefcha	1.27	const char *reg[13] = {
85	lefcha	1.15	"^([[:blank:]]\n\|#.\n)$",
86	lefcha	1.28	"^[[:blank:]]ACCOUNT[[:blank:]]+(([[:graph:]]+):([[:graph:]])\|([[:graph:]]+))@([[:alnum:].-]+)(:[[:digit:]]+)?[[:blank:]]([[:blank:]]SSL\|[[:blank:]]SSL2\|[[:blank:]]SSL3\|[[:blank:]]TLS1)?[[:blank:]]\n$",
87	lefcha	1.31	"^[[:blank:]]FOLDER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+([[:print:]]+)[[:blank:]]\n$",
88	lefcha	1.13	"^[[:blank:]]FILTER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]([[:blank:]]OR\|[[:blank:]]AND)?[[:blank:]]*\n$",
89	lefcha	1.30	"^[[:blank:]]ACTION[[:blank:]]+(DELETE\|COPY[[:blank:]]+(\"[[:print:]]\"\|[[:graph:]]+)\|MOVE[[:blank:]]+(\"[[:print:]]\"\|[[:graph:]]+)\|LIST)[[:blank:]]([[:graph:]])[[:blank:]]\n$",
90	lefcha	1.17	"^[[:blank:]](MASK[[:blank:]])?[[:blank:]](OR[[:blank:]]\|AND[[:blank:]])?[[:blank:]](NOT[[:blank:]])?[[:blank:]](ANSWERED\|DELETED\|DRAFT\|FLAGGED\|NEW\|OLD\|RECENT\|SEEN\|UNANSWERED\|UNDELETED\|UNDRAFT\|UNFLAGGED\|UNSEEN)[[:blank:]]*\n$",
91			"^[[:blank:]](MASK[[:blank:]])?[[:blank:]](OR[[:blank:]]\|AND[[:blank:]])?[[:blank:]](NOT[[:blank:]])?[[:blank:]](BCC\|BODY\|CC\|FROM\|SUBJECT\|TEXT\|TO)[[:blank:]]+(\"[[:print:]]\"\|[[:graph:]]+)[[:blank:]]\n$",
92			"^[[:blank:]](MASK[[:blank:]])?[[:blank:]](OR[[:blank:]]\|AND[[:blank:]])?[[:blank:]](NOT[[:blank:]])?[[:blank:]](HEADER)[[:blank:]]+(\"[[:print:]]\"\|[[:graph:]]+)[[:blank:]]+(\"[[:print:]]\"\|[[:graph:]]+)[[:blank:]]*\n$",
93	lefcha	1.26	"^[[:blank:]](MASK[[:blank:]])?[[:blank:]](OR[[:blank:]]\|AND[[:blank:]])?[[:blank:]](NOT[[:blank:]])?[[:blank:]](LARGER\|SMALLER\|OLDER\|NEWER)[[:blank:]]+([[:digit:]]+)[[:blank:]]*\n$",
94	lefcha	1.13	"^[[:blank:]]JOB[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]\n$",
95	lefcha	1.26	"^[[:blank:]](SET[[:blank:]])?[[:blank:]](LOGFILE)[[:blank:]]=[[:blank:]]([[:print:]]+)\n$",
96	lefcha	1.28	"^[[:blank:]](SET[[:blank:]])?[[:blank:]](HEADERS\|NAMESPACE)[[:blank:]]=[[:blank:]](YES\|NO)[[:blank:]]*\n$",
97	lefcha	1.34	"^[[:blank:]](SET[[:blank:]])?[[:blank:]](DAEMON\|TIMEOUT)[[:blank:]]=[[:blank:]]([[:digit:]]+)\n$"
98	lefcha	1.1	};
99
100	lefcha	1.27	for (i = 0; i < 13; i++)
101	lefcha	1.14	regcomp(&creg[i], reg[i], REG_EXTENDED \| REG_ICASE);
102	lefcha	1.1
103	lefcha	1.29	while (fgets(line, LINE_MAX - 1, fd)) {
104	lefcha	1.1	row++;
105	lefcha	1.15	if (!regexec(&creg[0], line, 0, match, 0))
106			continue;
107	lefcha	1.28	else if (!regexec(&creg[1], line, 8, match, 0))
108	lefcha	1.13	set_account(line, match);
109	lefcha	1.15	else if (!regexec(&creg[2], line, 3, match, 0))
110	lefcha	1.17	r = set_mboxgrp(line, match);
111	lefcha	1.15	else if (!regexec(&creg[3], line, 3, match, 0))
112	lefcha	1.17	r = set_filter(line, match);
113			else if (!regexec(&creg[4], line, 5, match, 0))
114			r = set_action(line, match);
115	lefcha	1.15	else if (!regexec(&creg[5], line, 7, match, 0) \|\|
116	lefcha	1.18	!regexec(&creg[6], line, 7, match, 0) \|\|
117			!regexec(&creg[7], line, 7, match, 0) \|\|
118			!regexec(&creg[8], line, 7, match, 0))
119	lefcha	1.17	r = set_mask(line, match);
120	lefcha	1.15	else if (!regexec(&creg[9], line, 3, match, 0))
121	lefcha	1.17	r = set_job(line, match);
122	lefcha	1.26	else if (!regexec(&creg[10], line, 4, match, 0) \|\|
123	lefcha	1.27	!regexec(&creg[11], line, 4, match, 0) \|\|
124			!regexec(&creg[12], line, 4, match, 0))
125	lefcha	1.15	set_options(line, match);
126	lefcha	1.17	else
127	lefcha	1.18	return row;
128
129	lefcha	1.17	if (r == ERROR_CONFIG_PARSE)
130			return row;
131	lefcha	1.1	}
132	lefcha	1.3
133	lefcha	1.27	for (i = 0; i < 13; i++)
134	lefcha	1.12	regfree(&creg[i]);
135	lefcha	1.18
136	lefcha	1.15	destroy_data();
137	lefcha	1.6
138	lefcha	1.8	return 0;
139	lefcha	1.1	}
140
141
142			/*
143	lefcha	1.13	* Set other options found in config file.
144	lefcha	1.11	*/
145			void set_options(char line, regmatch_t match)
146			{
147	lefcha	1.26	if (!strncasecmp(line + match[2].rm_so, "logfile", 7)) {
148	lefcha	1.19	if (!*logfile)
149	lefcha	1.26	strncat(logfile, line + match[3].rm_so,
150			min((match[3].rm_eo - match[3].rm_so), PATH_MAX - 1));
151	lefcha	1.27	} else if (!strncasecmp(line + match[2].rm_so, "header", 6)) {
152	lefcha	1.26	if (!strncasecmp(line + match[3].rm_so, "yes", 3))
153	lefcha	1.19	options \|= OPTION_HEADERS;
154	lefcha	1.25	else
155			options &= ~(OPTION_HEADERS);
156	lefcha	1.28	} else if (!strncasecmp(line + match[2].rm_so, "namespace", 9)) {
157			if (!strncasecmp(line + match[3].rm_so, "yes", 3))
158			options \|= OPTION_NAMESPACE;
159			else
160			options &= ~(OPTION_NAMESPACE);
161	lefcha	1.27	} else if (!strncasecmp(line + match[2].rm_so, "timeout", 7)) {
162			errno = 0;
163			timeout = strtol(line + match[3].rm_so, NULL, 10);
164			if (errno)
165			timeout = 0;
166	lefcha	1.34	} else if (!strncasecmp(line + match[2].rm_so, "daemon", 6) &&
167			!(options & OPTION_DAEMON_MODE)) {
168			options \|= OPTION_DAEMON_MODE;
169			errno = 0;
170			interval = strtoul(line + match[3].rm_so, NULL, 10);
171			if (errno)
172			interval = 0;
173	lefcha	1.19	}
174	lefcha	1.1	}
175	lefcha	1.29
176
177			#ifdef ENCRYPTED_PASSWORDS
178			/*
179			* Open password file and call parse_passwords().
180			*/
181			int read_passwords(void)
182			{
183			FILE *fd;
184			char pwfile[PATH_MAX];
185	lefcha	1.34
186			if (!(flags & FLAG_BLANK_PASSWORD))
187			return 1;
188	lefcha	1.31
189			passphr = (char *) smalloc(PASSPHRASE_LEN);
190	lefcha	1.29
191			snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords");
192			#ifdef DEBUG
193			printf("debug: passwords file: '%s'\n", pwfile);
194			#endif
195
196			if (!exists_file(pwfile))
197			return 1;
198
199			#ifdef CHECK_PERMISSIONS
200			check_file_perms(pwfile, S_IRUSR \| S_IWUSR);
201			#endif
202
203			fd = fopen(pwfile, "r");
204
205			if (!fd)
206			fatal(ERROR_FILE_OPEN, "imapfilter: opening passwords file %s; %s\n",
207			pwfile, strerror(errno));
208
209			parse_passwords(fd);
210
211			fclose(fd);
212
213			return 0;
214			}
215
216
217			/*
218			* Parse unencrypted password file.
219			*/
220			int parse_passwords(FILE * fd)
221			{
222			int t = 3;
223			char *pe = NULL;
224			char user[USERNAME_LEN], serv[SERVER_LEN];
225			unsigned char *buf;
226			char c, cp, *line;
227			regex_t creg;
228			regmatch_t match[4];
229			const char *reg = "([[:alnum:].-]+) ([[:graph:]]+) ([[:graph:]]+)";
230
231			do {
232			printf("Enter master passphrase: ");
233			get_password(passphr, PASSPHRASE_LEN);
234	lefcha	1.31	} while (decrypt_passwords(&buf, fd) && --t);
235	lefcha	1.29
236			if (!t)
237			return ERROR_PASSPHRASE;
238
239	lefcha	1.31	c = cp = sstrdup(buf);
240	lefcha	1.29
241			regcomp(&creg, reg, REG_EXTENDED \| REG_ICASE);
242
243			while ((line = strsep(&c, "\n")) &&
244			!regexec(&creg, line, 4, match, 0)) {
245			user[0] = serv[0] = 0;
246
247			strncat(serv, line + match[1].rm_so,
248			min(match[1].rm_eo - match[1].rm_so, SERVER_LEN - 1));
249			strncat(user, line + match[2].rm_so,
250			min(match[2].rm_eo - match[2].rm_so, USERNAME_LEN - 1));
251
252			if ((pe = (char *) find_password(user, serv)))
253			strncat(pe, line + match[3].rm_so,
254			min(match[3].rm_eo - match[3].rm_so, PASSWORD_LEN - 1));
255			}
256
257			regfree(&creg);
258	lefcha	1.31	sfree(cp);
259			sfree(buf);
260	lefcha	1.29
261			return 0;
262			}
263
264
265			/*
266			* Store encrypted passwords to file.
267			*/
268			int store_passwords(account_t * accts[])
269			{
270			char pwfile[PATH_MAX];
271			FILE *fd;
272
273			snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords");
274	lefcha	1.32
275			create_file(pwfile, S_IRUSR \| S_IWUSR);
276	lefcha	1.29
277			fd = fopen(pwfile, "w");
278
279			if (!fd)
280			fatal(ERROR_FILE_OPEN, "imapfilter: opening passwords file %s; %s\n",
281			pwfile, strerror(errno));
282
283			encrypt_passwords(fd, accts);
284
285			fclose(fd);
286
287			return 0;
288			}
289			#endif
290	lefcha	1.31
291
292			/*
293			* Create $HOME/.imapfilter directory.
294			*/
295			int create_homedir(void)
296			{
297	lefcha	1.33	char *hdn = ".imapfilter";
298	lefcha	1.31
299			if (home)
300			if (chdir(home))
301			error("imapfilter: could not change directory; %s\n",
302			strerror(errno));
303
304	lefcha	1.33	create_dir(hdn, S_IRUSR \| S_IWUSR \| S_IXUSR);
305
306	lefcha	1.31	return 0;
307			}
308
309
310			/*
311			* Check if a file exists.
312			*/
313			int exists_file(char *fname)
314			{
315			struct stat fs;
316
317			if (access(fname, F_OK))
318			return 0;
319
320			stat(fname, &fs);
321			if (!S_ISREG(fs.st_mode)) {
322			error("imapfilter: file %s not a regular file\n", fname);
323			return ERROR_FILE_OPEN;
324			}
325
326			return 1;
327			}
328
329
330			/*
331			* Check if a directory exists.
332			*/
333			int exists_dir(char *dname)
334			{
335			struct stat ds;
336
337			if (access(dname, F_OK))
338			return 0;
339
340			stat(dname, &ds);
341			if (!S_ISDIR(ds.st_mode)) {
342			error("imapfilter: file %s not a directory\n", dname);
343			return ERROR_FILE_OPEN;
344			}
345
346			return 1;
347			}
348
349
350			/*
351			* Create a file.
352			*/
353			int create_file(char *fname, mode_t mode)
354			{
355			int fd = 0;
356
357	lefcha	1.33	if (!exists_file(fname)) {
358			fd = open(fname, O_CREAT \| O_WRONLY \| O_TRUNC, mode);
359	lefcha	1.31	if (fd == -1) {
360			error("imapfilter: could not create file %s; %s\n", fname,
361			strerror(errno));
362			return ERROR_FILE_OPEN;
363			}
364			close(fd);
365	lefcha	1.33	}
366	lefcha	1.31
367			return 0;
368			}
369
370
371			/*
372			* Create a directory.
373			*/
374			int create_dir(char *dname, mode_t mode)
375			{
376			if (!exists_dir(dname))
377			if (mkdir(dname, mode))
378			error("imapfilter: could not create directory %s; %s\n", dname,
379			strerror(errno));
380
381			return 0;
382			}
383
384
385			#ifdef CHECK_PERMISSIONS
386			/*
387			* Check the permissions of a file.
388			*/
389			int check_file_perms(char *fname, mode_t mode)
390			{
391			struct stat fs;
392
393			if (stat(fname, &fs)) {
394			error("imapfilter: getting file %s status; %s\n", fname,
395			strerror(errno));
396			return ERROR_TRIVIAL;
397			}
398			if (!S_ISREG(fs.st_mode)) {
399			error("imapfilter: file %s not a regular file\n", fname);
400			return ERROR_TRIVIAL;
401			}
402			if ((fs.st_mode & 00777) != mode) {
403			error("imapfilter: warning: improper file %s permissions\n"
404			"imapfilter: warning: file's mode should be %o not %o\n",
405			fname, mode, fs.st_mode & 00777);
406			return ERROR_TRIVIAL;
407			}
408			return 0;
409			}
410
411
412			/*
413			* Check the permissions of a directory.
414			*/
415			int check_dir_perms(char *dname, mode_t mode)
416			{
417			struct stat ds;
418
419			if (stat(dname, &ds)) {
420			error("imapfilter: getting file %s status; %s\n", dname,
421			strerror(errno));
422			return ERROR_TRIVIAL;
423			}
424			if (!S_ISDIR(ds.st_mode)) {
425			error("imapfilter: file %s not a directory\n", dname);
426			return ERROR_TRIVIAL;
427			}
428			if ((ds.st_mode & 00777) != mode) {
429			error("imapfilter: warning: improper dir %s permissions\n"
430			"imapfilter: warning: file's mode should be %o not %o\n",
431			dname, mode, ds.st_mode & 00777);
432			return ERROR_TRIVIAL;
433			}
434			return 0;
435			}
436			#endif
437	lefcha	1.33
438
439	lefcha	1.31